A small plane taxis at the airport in Szymany, Poland, Tuesday, Oct. 19, 2010. Lawyers and rights activists believe that this was the airport used to ferry terrorism suspects in and out of Poland when the CIA ran a secret prison in the eastern European country. Former U.S. intelligence officials have said the spy agency operated the site code-named "Quartz" in northern Poland from December 2002 to the fall of 2003. Scottish Police are investigating possible CIA rendition sites in their own country.

Documents Confirm CIA Had Rendition Flight Lurking In Europe To Catch Snowden

A Danish news website has published documents backing up the allegations that in June 2013 a US plane with a connection to CIA black site programs was on call in Copenhagen ready to snatch NSA whistleblower Edward Snowden as he was stranded in Moscow.